Dell Dimension XPS 50 Reference Manual page 10

Screen text is a message or text that you are instructed to type as part of a com-
mand (referred to as a command line). Screen text is presented in the Courier
New font.
Example: The following message appears on your screen:
No boot device available
Example: "Type md c:\programs and press <Enter>."
Variables are placeholders for which you substitute a value. They are presented in
italics.
Example: DIMM_x (where x represents the DIMM socket designation)
xii